Low cerebrospinal fluid protein in prepubertal children with idiopathic intracranial hypertension

Area of Science:

• Pediatric Neurology
• Ophthalmology
• Neurosurgery

Background:

• Idiopathic intracranial hypertension (IIH) is a condition characterized by increased intracranial pressure without a clear cause.
• Previous observations suggested a potential difference in cerebrospinal fluid (CSF) protein levels between prepubertal and pubertal patients with IIH.

Purpose of the Study:

• To investigate the hypothesis that prepubertal children diagnosed with IIH have lower CSF protein concentrations compared to healthy children and pubertal IIH patients.
• To explore the potential diagnostic utility of CSF protein levels in prepubertal IIH.

Main Methods:

• Retrospective review of medical records from pediatric neuro-ophthalmology clinic (2003-2013).
• Inclusion of prepubertal IIH patients, pubertal IIH patients, and healthy children as controls.
• Analysis of demographic data, clinical presentation, disease course, and lumbar puncture results, focusing on CSF protein levels.

Main Results:

• Prepubertal IIH patients exhibited significantly lower CSF protein levels (17.3 ± 5.7 mg/dL) than pubertal IIH patients (23.4 ± 8.4 mg/dL) and controls (23.5 ± 6.4 mg/dL).
• A notable proportion (39%) of prepubertal IIH patients had abnormally low CSF protein levels (<15 mg/dL), a finding not observed in pubertal IIH patients or controls.
• Treatment with acetazolamide led to a significant increase in CSF protein levels in all patients who underwent repeat lumbar puncture.

Conclusions:

• Low CSF protein levels may serve as a valuable biomarker for the diagnosis of IIH in prepubertal children.
• The observed low CSF protein levels in prepubertal IIH suggest that CSF overproduction, rather than impaired CSF resorption, could be a primary mechanism in some cases.
• Further research is warranted to elucidate the pathophysiology and optimize diagnostic strategies for prepubertal IIH.